I got two silkies last month, and they lived in the house for a month, till I built them their own coop & run. I have 15 large breed hens & roo, and I knew they would not last around them.
I do want to get some Maran chicks in the spring, and was thinking about putting them with the Silkies, after the quarantine time was over. Then once they got full size introduce them to the older flock.
My 15 chickens are two separate flocks, had 10, then got 3, two weeks later, then 2 weeks later got 2 more. The 10 were in the coop & the 5 were in the house. Took me a month for them to be civil to each other in the run, and another month for them to behave in the coop. Lucky for me, no blood or feather pulling. Even now, they have been together for 4 months, the 5 youngers and at the bottom of the pecking order, and will get chased off, by the older ones.